Multiply: x2−16x+5⋅x+5x−4\frac{x^2-16}{x+5} \cdot \frac{x+5}{x-4}x+5x2−16⋅x−4x+5.
x+4x+4x+4
x−4x-4x−4
(x+4)(x−4)(x+4)(x-4)(x+4)(x−4)
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